A Copied Image Has Black Streaks In The Horizontal Direction; A Copied Image Has White Streaks Or Color Streaks In The Horizontal Direction; The Area Around A Black Solid Image On The Back Side Is Slightly Stained When Duplex Copying Using The Bypass Tray Is Performed; A Color Original Is Copied In Black-And-White Even If [Auto Color] Is Selected For The Color Mode - Toshiba E-STUDIO 2020AC Frequently Asked Questions Manual

2.QUESTIONS FOR COPYING
 A copied image has black streaks in the horizontal direction.
This may occur due to the following causes. Check them and take the appropriate actions.
The scanning area and guide are stained.
Fine dust can cause a conspicuous scanning
noise on images while originals are being
scanned with the ADF.
 A copied image has white streaks or color streaks in the horizontal direction.
Clean the main charger, LED print head and slit glass. For details, see the reference below:
Troubleshooting - TROUBLESHOOTING FOR THE HARDWARE - Cleaning the Inside of the Equipment
 The area around a black solid image on the back side is slightly stained when duplex
copying using the bypass tray is performed.
A misalignment occurred in the output of the back side due to dry sheet trouble as a result of low humidity. For thick
paper, copy the back side by selecting "(BACK)" for the paper type. For plain paper, make 2-sided copies using the
automatic duplexing unit. For details, see the reference below:
Copy - HOW TO MAKE COPIES - Specifying the Paper Type
 A color original is copied in black-and-white even if [Auto Color] is selected for the color
mode.
Some color originals such as those below may be copied in black-and-white.
 Originals with very few colored areas
 Overall blackish originals
 Originals in light colors
In such a case, select [Full Color] for the color mode.
Alternatively, change the criterion for determining whether an original is black-and-white or color. For details, see the
reference below:
User Functions - SETTING ITEMS (User) - Copy
 A black-and-white original is copied in color even if [Auto Color] is selected for the color
mode.
Some black-and-white originals such as those below may be copied in color.
 Yellowed originals
 Originals with a colored background
In such a case, select [Black] for the color mode. Alternatively, change the criterion for determining whether an
original is black-and-white or color. For details, see the reference below:
User Functions - SETTING ITEMS (User) - Copy
 A copied image is skewed against the paper.
The paper in the drawer will be fed at a skew. Check and adjust the space between the paper and the side guides to
ensure that it is not too great. For details, see the reference below:
Preparation of Paper - LOADING PAPER - Loading Paper in Drawers
22 Questions for Copying
Clean them. For details, see the reference below:
Troubleshooting - REGULAR MAINTENANCE - Regular
Maintenance
Set ADF Noise Reduction to reduce the scanning noise which can
be caused while originals are being scanned. For details, see the
references below:
Copy - USING IMAGE ADJUSTMENT FUNCTIONS - Reducing
the Scan Noise
User Functions - SETTING ITEMS (Admin) - General - Setting
the scanner streaks reduction function